As the head of a social services agency, you believe that your staff of 20 social workers is very much overworked compared to 10 years ago. The case loads for each worker are ­reported below for each...

As the head of a social services agency, you believe that your staff of 20 social workers is very much overworked compared to 10 years ago. The case loads for each worker are ­reported below for each of the two years in question. Has the average case load increased? What measure of central tendency is most ­appropriate to answer this question? Why?